A patient presents with easy bruising, petechiae, and a prolonged bleeding time. What is the most likely underlying coagulation disorder?

A Von Willebrand disease
B Hemophilia A
C Platelet function disorder ✓
D Factor XIII deficiency

Explanation

The patient's symptoms suggest a disorder affecting primary hemostasis, which is most consistent with a platelet function disorder.

Source

Williams Hematology
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Easy MEDICAL Confidence: high